| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [vb mod] happen to | 375 |
|
| 2 | [pron] [vb mod] [adv] happen | 173 |
|
| 3 | [pron] [adv] happen to | 158 |
|
| 4 | [vb mod] [adv] happen to | 30 |
|
| 5 | [pron] [vb mod] [adv] to | 22 |
|
